It was stated they were holding back because the enemy looked like Kakarrot though.Vegeta wins. A 1.3x gap was massive during the Namek arc. Vegeta killed Cui with a flick of his finger at that range. Ginyu-Goku would have been negged fast if Gohan was at 30k, no Kuririn needed.
He still should have been able to beat his father easily at that power gap even while holding back. Vegeta was able to effortlessly restrain Dodoria at no more than a 1.2x gap at the absolute most. Possibly even less since Dodoria and Zarbon were only mildly skeptical by the initial 22k reading and only said it was stronger than them after the 24k reading.It was stated they were holding back because the enemy looked like Kakarrot though.